Ice-cream freezer



A. W. EDWARDS.

Ice-Cream Freezer.

No. 51,160. Patented Nov. 28, 1865.

Witnesses= lnvenror= AM. PHOT0-LlTHO.C0.N.Y. iOSBURNE'S PROCESS) UNTTEDSTATES PATENT OFFICE.

ALBERT W. EDWVARDS, OF MENDOTA, ILLINOIS.

ICE-CREAM FREEZER.

Specification forming part of Letters Patent No. 51,160, dated November28, 1865.

To all whom it may concern:

Be it known that I, ALBERT W. EDWARDS, of Mendota in the county of LaSalle and State of Illinois, have invented an Improved Ice- (lreamFreezer; and I do hereby declare that the following, taken in connectionwith the drawings which accompany and form part of this specification,is a description of my invention sufficient to enable those skilled inthe art to practice it.

The object of this invention is to obtain such a construction andarrangement of rotary beaters in the cream-holder as shall conduce tothe most rapid congelation of the cream. This result is effected by theproduction of central and outer currents, the cream being carried up inthe center and down in the outer portions of the cream-holder, themechanism employed for the purpose being two vertical sets of rotaryheaters, the heaters in one set running from the center spindle outward,and those of the other from a vertical arm near the inner surface of thecream-cylinder inward, each set rotating in a space distinct from theother and being so inclined with respect to each other that the outerset shall produce a downward current of the cream and the inner set anupward current.

In a freezer patented in the year 1862 there were two sets of heatersemployed, one set running from the spindle outward and the other setfrom or near the inner surface of a stationary scraper inward, but thetwo sets overlapped, so that instead of producing distinct up and downcurrents they merely acted in their rotation to whip or commingle theparticles of cream. Such is not the object or result of my invention,which is to produce an inner and outer vertical current, and it is thedisposition of the arms or heaters effecting this current or currentsthat constitutes my improvement.

In the construction of rotary cream-cylinders a stationary scraper hassometimes been employed, but it is found that in the rapid rotationrequired to freeze the cream too great strain is brought to bear uponthe scraper 5 and to obviate this defect I give to the scraper a rotarymotion in the same direction with the motion imparted to thecream-vessel, but at a slower rate of speed, thus freeing the scraperfrom injurious strain, while at the same time giving to the surface ofthe cream-holder such relative motion with respect to the scraper as tocause the adhering particles of freezing cream to be detached from thesides of the chamber. The construction or arrangement by which this iseffected constitutes part of my invention.

The drawing shows a vertical central section of a freezer embodying myimprovements.

a denotes the ice-chamber or receptacle, 1) the cream-cylinder having apivot, c, at its lower end, by which it is supported so as to turn in abearin g, d, in the ice-vessel a. A vertical spindle, 0, extendscentrally through the cream-holder, and is supported in a bearing, f, inthe lower end of the cream-holder. The spindle extends up through thecover of the cream-holder, and thence through the cover of theice-vessel a, thereby sustaining the creamholder centrally in the vessela.

The spindle 6 has avertical bar, g, attached to it by arms h, and tothis bar g and to the spindle 6 two series of heaters, 'i k, are fixed,the set '6 extending from the bar toward the spindle, and the set 70extending radially from the spindle, the set is rotating in the centerof the cream-holder, and the set 'i in the space between the path ofrotation of the heaters 70 and the inner surface of the vessel 12. Eachheater t'is inclined so that in its rotative movement it shall force thecream with which it comes in contact downward, and each heater is is inclined so that in its rotative movement it shall force the cream upward,the current thus produced being down at the sides and up at the center,as shown by the arrows.

Rotation is imparted to the spindle and heat ers by means of abevel-gear, l, on the crankshaft m, meshing into a pinion, n, fixed uponthe spindle c, and similar rotative' movement is imparted to thecream-holder b by the driving-gear l meshing into a pinion, o, fixed onthe top of the cover of the cream-holder, the pinion 0 being fast on thecover, but turning loosely with respect to the spindle. The spindle 0extends loosely through a tubular spindle, p, upon which is hung thescraper g. This tubular spindle has fast upon it a pinion, 1', intowhich a pinion, s, on the crank-shaft en gages, the scraper beingthereby turned in the same direction as the cream-holder is rotated,

but at a much slower speed, thus effecting the detachment of theadhering cream without strain upon the scraper.

It is well known that in the action of freezers the tendency of theparticles of cream is first to freeze at the top and along the outerportions of the cream-Vessel. It, as these particles become chilled andfrozen, they can be carried into the central part of the vessel, and thecream at the center be carried to the sides, it will be obvious that thecream will be frozen with greater expedition than in any other movementthat can be imparted to such particles, and that this can be besteffected by instituting regular currents from the co1dest.to the warmestparts of the vessel, and vice versa, such currents being down from thetop by the sides and up through the center.

By such construction Iain enabled to freeze the cream with much greaterfacility than can be efi'ected with the freezers above alluded to, orwith any others in common use.

I claim 1. Thecombination of a cream-holder rotating in one direction,with two sets of beaters ro- ALBERT W. EDWARDS.

Witnesses:

F. GOULD, J. B. CROSBY.

